Video Window

Categories

_{The AVI Window}

_{The AVIWindow features the display of video (AVI files) together with forceplate vectors and stick figures.}

_{Important: The loading of forceplate vectors and stickfigures in the AVIWindow is only possible with APAS system files (.ANA, .3D, .#T and .AVI). The data from each file must be synchronisation to each other. If this is not the case, the APASview will not display the data correctly.}

_{It is possible to load three types of data into the AVIWindow}

_{1. Loading AVI video.}

_{2. Loading AVI video and stickfigure.}

_{3. Loading AVI video, stickfigure and forceplate vectors.}

_{Opening a AVIWindow:}

To open a new instance of the AVIWindow you can use the following procedures:

1. The New AVIWindow in the file menu

2. The speedbutton in the APASview speedbar panel.

As default the name/title of the AVIWindow will be the filename. To change this double click on the gray speedbar panel, next to the speedbuttons. The name can only be changed if data is loaded.

_{General configuration}

_{The AVI setup window is used to configure the data to be loaded into the AVIWindow.}

_{Markers and their connections.}

_{Co-ordinates from film data are normally used to link human joints together in segments. When loading APAS .3D datafiles the position of the markers are loaded into APASview. From the APAS .CF configuration file APASview is told how the marker data are supposed to be displayed. Editing the configuration of the display of marker data can be performed in the StickWindow set-up.}

_{Marker size}

_{With Marker Size it is possible to select the size of the markers displayed in the window (Min. size is 1 and Max. is 10).}

_{Displaying markers on the canvas}

_{It is possible to disable and enable the display of the markers individually. Using the button Display All causes the display of all the markers to be enabled or disabled.}

_{How is a segment defined ?}

_{One segments is defined as a connection from one marker to another. If you have the ankle connected to the knee you have created the calf. Creating a new segment requires 3 steps:}

_{1. Select a marker from the marker list (when selecting a marker from the Marker List, the corresponding marker connection will be shown in the box below the Marker List).}

_{2. Select the marker to be connected to from the Marker Selection table (This list shows all the markers in the APAS .3d file)}

_{3. After selecting a marker to connect to, you must push the button , indicating a add for the connection list.}

_{Deleting a segment}

_{1. Select a marker from the marker list (when selecting a marker from the Marker List, the corresponding Maker connection will be shown in the box below the Marker List).}

_{2. Select a marker from the Marker Connection table just below the Marker List menu.}

_{3. Push the Del. button and the Marker Connection is removed.}

_{Segment Color}

_{When evaluating motion with numerical data such as EMG, force, or velocity it can be difficult to find a relation ship. Coloring the segments and numericaldata makes this a lot easier.}

_{Defining a colour for a specific segment can be obtained in 4 steps:}

_{1. Select a Marker from the Marker List}

_{2. Select a Connected Marker which creates the segment.}

_{3. Click on the color button}

_{4. Select the color}

_{Data synchronisation:}

_{These two parameters are used to synchronise either the StickWindow with respect to other windows or to synchronise the forceplate data together with the stickfigure data.}

_{Window sync}

_{Example to synchronise StickWindow with other windows:}

_Window1

_{-----[]----[]----[]----[]----[]----[]----[]----[]----[]----[]----[]---}

_{1 2 3 4 5 6 ……}

_Window2

_{-----[]----[]----[]----[]----[]----[]----[]----[]----[]----[]----[]---}

_{1 2 3 4 5 6 ……}

_{In this situation the data is aligned in time, which is important for the APASview to display correct. But in window1 the first sample has to be aligned together with window2 sample number 2. This is accomplished by setting the Window sync to 1.}

_{Stickfigure sync:}

_{This parameter is used to synchronise the stickfigure data with respect to the AVI file data to be loaded.}

_{Forceplate sync:}

_{Example to synchronise Stickfigure data with forceplate data:}

_{Stickfigure data:}

_{-----[]----------[]----------[]----------[]----------[]----------[]----}

_{1 2 3 4 5 6 ……}

_{Forceplate data:}

_{-----[]----[]----[]----[]----[]----[]----[]----[]----[]----[]----[]---}

_{1 2 3 4 5 6 ……}

_{Normally the forceplate data is sampled with a much higher frequency than marker trajectory data. This problem is taken care of in the APASview, by averaging the forceplate data to fit the marker trajectory data (Stickfigure). If for example the forceplate is sampled with 1000Hz and the marker trajectory with 50Hz, the forceplate data will be reduce with a factor of 20. In some cases it is useful to be able to synchronise the forceplate data together with the marker trajectory. In the above example the Forceplate sync should be set to 3 if the data sample number 4 in the forceplate data has to be aligned together with the first sample in the marker trajectory (stickfigure). #$K Loading AVI video into the AVIWindow}

_{Open a new instance of the AVIWindow you can use the following options:}

_{1. The New AVIWindow in the file menu}

_{2. The speedbutton in the APASview speed bar panel.}

_{3. Open a new instance of the AVIWindow}

_{4. Double click on the AVIWindow canvas, to obtain the set-up window.}

_{5. Double click in the File Name textbox and use the fileopen window.}

_{6. Exit set-up window.}

_{The AVI video is loaded into the AVIWindow.}

_{As default the name/title of the AVIWindow will be the AVI filename loaded. To change this press the Alt key on the keyboard and double click on the AVIWindow canvas. The name can only be changed if data is loaded.}

Loading AVI video sequence

_{Note: It is not possible to load the same AVI file in two different window.}

_{Open a new instance of the AVIWindow using the following options:}

_{1. The New AVIWindow in the file command menu}

_{2. The speedbutton in the APASview speed bar panel.}

_{Follow the next steps to load stickfigure and AVI video:}

_{1. Double click in the File Name textbox and use the fileopen window to locate the AVI video (file).}

_{2. Click the OK button and the AVI file is loaded.}

_{Loading stickfigure into the AVIWindow}

_{Requirements:}

_{Before the data can be displayed a few files must be located in the same directory. A stickfigure file (APAS .3D), a AVI file and a view file (*.#t).}

_{Open a new instance of the AVIWindow you can use the following options:}

_{1. The New AVIWindow in the file menu}

_{2. The speedbutton in the APASview speed bar panel.}

_{Follow the next steps to load stickfigure and AVI video:}

_{1. Double click in the File Name textbox and use the fileopen window to locate the AVI video (file).}

_{2. Double click in the Stick File Name textbox and use the fileopen window to locate the stick filename.}

_{3. Specify the view file number (APAS *.#t file), which was created under the digitising process. It is important that this file is the same file as used for the digitising process. This file will give the APASview the information about the calibration frame and other useful information for the calculation of the marker position.}

_{4. Select if the stick figure must be superimposed on the AVI video. This parameter can be useful if also the forceplate vectors is loaded. It will give a less confusing display, and easier evaluation of the data.}

_{5. Exit the set-up window.}

_{The data is loaded into the AVIWindow. If the configuration of the stickfigure has to be modified use the AVIWindow setup.}

_{As default the name/title of the AVIWindow will be the AVI filename loaded. To change this press the Alt key on the keyboard and double click on the AVIWindow canvas. The name can only be changed if data is loaded.}

_{Loading forceplate vectors into the AVIWindow}

_{Requirements:}

_{Before the data can be displayed a few files must be located in the same directory. A stickfigure file (APAS .3D), a AVI file, a forceplate datafile (APAS .ANA) and a view file (*.#t). It is not possible only to load forceplate vectors and leave out the stickfigure, this is due to fact that the APASview needs the information about the where the forceplate is located in respect to the global co-ordinate system.}

_{Open a new instance of the AVIWindow you can use the following options:}

_{1. The New AVIWindow in the file menu}

_{2. The speedbutton in the APASview speed bar panel.}

_{Use the following steps to load AVI video, stickfigure and forceplate vectors:}

_{1. Double click in the File Name textbox and use the fileopen window to locate the AVI video (file).}

_{2. Double click in the Stick File Name textbox and use the fileopen window to locate the stick filename.}

_{3. Specify the view file number (APAS *.#t file), which was created under the digitising process. It is important that this file is the same file used for the digitising process, it will give the APASview the information about the calibration frame and other useful information for the calculation of the marker position, forceplate centre of pressure and forcevectors.}

_{4. Select if the stick figure must be displayed.}

_{5. Select the forceplate reference marker to locate the forceplates in the global co-ordinate system. If the information in the APAS .ANA file must be used to locate the second forceplate with respect to the first forceplate the field for the reference marker number 2 must be left blank.}

_{6. Exit the set-up window.}

_{The data is loaded into the AVIWindow. If the configuration of the stickfigure has to be modified use the AVIWindow setup.}

_{As default the name/title of the AVIWindow will be the AVI filename loaded. To change this press the Alt key on the keyboard and double click on the AVIWindow canvas. The name can only be changed if data is loaded.}

_{Ground reaction force vector zooming/scaling.}

_{If the AVIWindow is loaded with ground reaction data/forcevectors the length of the force vector is accomplished holding the keyboard shift button and moving the mouse up and down. 100% forcevector length is calculated to be the maximum height of the loaded stick diagram. The force vector can be scaled between 1 and 200%.}

_{Copy to the clipboard:}

_{It is possible to copy the contents from a window to the clipboard using the} speedbutton. This feature can be used to further modify the printing output of the window contents. It can also be used to import graphics directly to a word processor. Use from the File menu the preference option to adjust the output format.

_Printing

Using the speedbutton It is possible to print the contents ofa window. Use from the File menu the preference option to adjust the output format. The Printer setup is used to select the desired printer and to setup the printer.

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